CVE-2026-111133
MEDIUM
CVSS 6.1
Published: 2026-10-15
Modified: 2026-10-16
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Description
libfsapfs through 20260921 contains an integer underflow in libfsapfs_key_encrypted_key_read_data() that allows attackers to trigger heap out-of-bounds reads via crafted KEK attributes. Attackers can supply a crafted encrypted APFS image with malformed HMAC or wrapped KEK attribute lengths to crash fsapfsinfo, pyfsapfs, dfVFS or plaso and read adjacent heap memory before password checks.
Quick Facts
| CVE ID | CVE-2026-111133 |
| CVSS Score | 6.1 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |
| Published | 2026-10-15 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/libyal/libfsapfs
- https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0…
- https://github.com/libyal/libfsapfs/blob/4c7c1c21f3cfc7d35f0…
- https://hackmd.io/@haind-pwn/libfsapfs-key-encrypted-key-att…
- https://www.vulncheck.com/advisories/libfsapfs-through-20260…
- https://hackmd.io/@haind-pwn/libfsapfs-key-encrypted-key-att…